‘Planetary boundaries’ necessary for flourishing of life have been massively breached, scientists warn
Summary
Scientists say that seven out of nine important Earth limits, called planetary boundaries, have been crossed at the worst levels ever. These boundaries include climate change and damage to ecosystems, which threaten the stability needed for human life.Key Facts
- There are nine planetary boundaries that help keep Earth safe for life.
- Seven boundaries are currently crossed at their highest levels, including climate change and ocean acidification.
- Only two boundaries, ozone layer depletion and atmospheric aerosols, have improved somewhat recently.
- Crossing these boundaries raises the risk of large-scale and irreversible damage to the planet.
- Human activities like burning fossil fuels, cutting forests, and polluting water are major causes.
- Natural systems like forests and oceans, which absorb carbon dioxide, are weakening.
- The Amazon rainforest could change into a savannah, which would harm climate, food, and water security globally.
- Recent extreme weather events like floods, heatwaves, and wildfires are linked to these planetary changes.
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